EP0557239B1 - Ventilateur axial et orifice - Google Patents

Ventilateur axial et orifice Download PDF

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Publication number
EP0557239B1
EP0557239B1 EP93630013A EP93630013A EP0557239B1 EP 0557239 B1 EP0557239 B1 EP 0557239B1 EP 93630013 A EP93630013 A EP 93630013A EP 93630013 A EP93630013 A EP 93630013A EP 0557239 B1 EP0557239 B1 EP 0557239B1
Authority
EP
European Patent Office
Prior art keywords
fan
blade
root
tip
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP93630013A
Other languages
German (de)
English (en)
Other versions
EP0557239A3 (fr
EP0557239A2 (fr
Inventor
Yehia Mahmoud Amr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Original Assignee
Carrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25271965&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0557239(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Carrier Corp filed Critical Carrier Corp
Publication of EP0557239A2 publication Critical patent/EP0557239A2/fr
Publication of EP0557239A3 publication Critical patent/EP0557239A3/fr
Application granted granted Critical
Publication of EP0557239B1 publication Critical patent/EP0557239B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • F04D29/386—Skewed blades
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/05—Variable camber or chord length

Definitions

  • the elliptical portion of the fan shroud should be on the side of the shroud that faces the incoming air stream.
  • FIG. 2A illustrates several features of the fan of the invention.
  • the figure is a partial front elevation view of fan 10 showing hub 11 and blade 13 .
  • Blade 13 has root 17 , where the blade meets and attaches to the hub, and tip 18 , which is the outer extremity of the blade.
  • Blade 13 also has leading edge 20 and trailing edge 19 .
  • Line 14 is the blade midchord line, which is the locus of points that are circumferentially equidistant from leading edge 20 and trailing edge 19 .
  • Blade 13 has span S , the radial distance from hub 11 to tip 18 .
  • Blade 13 can be divided into root portion 15 and tip portion 16 .
  • FIGS. 5A and 5B depict in front and side elevation views, respectively, another embodiment of the present invention. That embodiment differs from the embodiment shown in FIGS. 1A and 1B in that the fan has a shroud fixed to and rotating with it. In addition, a specially configured orifice can be fitted in conjunction with the shrouded fan to direct air flow into the fan.
  • FIGS. 5A and 5B show fan 110 mounted behind and coaxially with orificed bulkhead 130 . Fan 110 in all significant details identical to fan 10 ( FIGS 1A and 1B ) except that fan 110 has shroud 125 surrounding and affixed to the tips of blades 113 . Orificed bulkhead 130 has orifice 131 passing through it.
  • FIG. 6 is a partial front elevation view of fan 110 showing blade 113 and a portion of hub 111 as well as boss 112 .
  • Blade 113 has root 117 , where the blade meets and attaches to the hub, and tip 118 , which is the outer extremity of the blade.
  • Blade 113 also has leading edge 120 and trailing edge 119 .
  • Blade 113 can be divided into root portion 115 and tip portion 116 .
  • the limits of root portion 115 and tip portion 116 are, respectively, the same as the limits of root portion 15 and tip portion 116 shown in FIG. 2A .
  • R f is the fan radius, or one half fan diameter Df .
  • FIG. 7 is an expanded view, in cross section, of the portion of shroud 125 and orifice 131 highlighted in FIG. 6 .
  • Main section 127 of shroud 125 is generally cylindrical in cross section and is attached to blade 113 along its interior surface.
  • Inlet section 126 of shroud 125 flares out from main section 127 .
  • the cross section of inlet section 126 is that of a quarter section of an ellipse having a major axis that is parallel to the axis of rotation of fan 110 .
  • Inlet section 132 of orifice 131 has a cross section that is similarly a quarter section of an ellipse having a major axis that is parallel to the axis of orifice 131 and thus also to the axis or rotation of fan 110 .
  • Throat portion 133 of orifice 131 is generally cylindrical and has the same inner diameter as the inner diameter of main section 127 of shroud 125 .
  • the clearance between shroud 125 and orifice 131 should be as small as manufacturing and operational considerations will allow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (6)

  1. Ventilateur axial (10) comprenant un moyeu central (11) et une pluralité de pales (13) s'étendant à partir de ce moyeu, chacune de ces pales présentant un pied (17), un bout (18), une portion de pied (15) dans laquelle la ligne moyenne (14) de cette pale présente une flèche dans une première direction par rapport au sens de rotation du ventilateur, une portion de bout (16) dans laquelle la ligne moyenne de la pale présente une flèche dans une seconde direction, opposée à la première direction, par rapport au sens de rotation du ventilateur, un pas variable (Γ) qui va en diminuant en allant du pied vers le bout de la pale, caractérisé en ce qu'il présente une corde variable (Ch) qui augmente en allant du pied vers le bout de la pale et un angle de cambrure (Θ) qui va en diminuant en allant du pied vers le bout de la pale.
  2. Ventilateur suivant la revendication 1 caractérisé en ce que la flèche (Ah) de la ligne moyenne de la pale, à l'endroit du pied, va de vingt à trente degrés (20-30°), la flèche (At) de la ligne moyenne de la pale, à l'endroit du bout, va de quarante à soixante-dix degrés (40-70°), le point à flèche nulle (A₀) de la ligne moyenne de la pale est situé axialement en un point se trouvant entre vingt-cinq et cinquante centièmes (0,25-0,5 fois) de l'envergure (S) de la pale à partir du pied et l'angle d'inclinaison à mi-corde (Σ) de la pale est égal à cinq à six dixièmes (0,5-0,6 fois) de l'espacement angulaire entre des pales voisines.
  3. Ventilateur suivant l'une quelconque des revendications 1 ou 2 caractérisé en ce qu'il comprend en outre un bord d'attaque (20) et l'écart maximal de la ligne de cambrure (Ca) de la pale par rapport à la corde se trouve être situé entre trente à quarante-cinq centièmes (0,3-0,45 fois) de la longueur de la corde en partant du bord d'attaque.
  4. Ventilateur suivant l'une quelconque des revendications 1 à 3 caractérisé en ce qu'il comporte en outre une couronne circonférentielle (125) entourant les pales et fixée à celles-ci a l'endroit de leurs bouts, cette couronne ayant une section d'entrée (126) qui est, dans toutes les sections effectuées par des plans passant par l'axe de rotation du ventilateur, une section d'un quart d'une ellipse ayant un grand axe qui est parallèle à l'axe de rotation du ventilateur, et une section principale cylindrique (127).
  5. Ventilateur suivant la revendication 4 caractérisé en ce qu'il comprend en outre un orifice (131) qui comprend une structure de paroi ayant un axe central qui, une fois cette structure assemblée avec le ventilateur, coïncide avec l'axe de rotation du ventilateur, une portion d'entrée (132) qui est, dans toutes les coupes effectuées par les plans passant par l'axe central, une section d'un quart d'une ellipse ayant un grand axe qui est parallèle à l'axe central, et une section de gorge cylindrique (133) qui a le même diamètre interne que la section principale cylindrique de la couronne circonférentielle.
  6. Ventilateur suivant l'une quelconque des revendications 4 ou 5 caractérisé en ce que l'ellipse dont un quart définit le contour de la section d'entrée (126) de la couronne du ventilateur, a un grand axe (AMf) qui va de quinze à cinquante millièmes du diamètre (Df) du ventilateur (c'est-à-dire qui est égal à 0,015 à 0,05 fois ce diamètre) et un petit axe (Amf) qui va de cinq à huit dixièmes du grand axe (AMf) (c'est-à-dire qui est égal à 0,5 à 0,8 fois cet axe), et l'ellipse dont un quart définit le contour de la portion d'entrée (132) de la structure de l'orifice, a un grand axe (AMo) qui va de cinq à dix centièmes du diamètre (Df) du ventilateur (c'est-à-dire qui est égal à 0,05 à 0,1 une fois ce diamètre) et un petit axe (Amo) qui va de cinq à huit dixième de ce grand axe (AMo) (c'est-à-dire égal à 0,5-0,8 fois cet axe).
EP93630013A 1992-02-18 1993-02-11 Ventilateur axial et orifice Revoked EP0557239B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US836437 1992-02-18
US07/836,437 US5273400A (en) 1992-02-18 1992-02-18 Axial flow fan and fan orifice

Publications (3)

Publication Number Publication Date
EP0557239A2 EP0557239A2 (fr) 1993-08-25
EP0557239A3 EP0557239A3 (fr) 1993-10-06
EP0557239B1 true EP0557239B1 (fr) 1996-05-01

Family

ID=25271965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93630013A Revoked EP0557239B1 (fr) 1992-02-18 1993-02-11 Ventilateur axial et orifice

Country Status (8)

Country Link
US (1) US5273400A (fr)
EP (1) EP0557239B1 (fr)
JP (2) JP2746806B2 (fr)
KR (1) KR970011168B1 (fr)
BR (1) BR9300587A (fr)
ES (1) ES2048695T3 (fr)
MX (1) MX9300801A (fr)
TW (1) TW245757B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102947595A (zh) * 2010-04-05 2013-02-27 穆尔风扇有限责任公司 包括包含超低噪音风扇叶片的轴流风扇的商业空气冷却装置

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Publication number Priority date Publication date Assignee Title
CN102947595A (zh) * 2010-04-05 2013-02-27 穆尔风扇有限责任公司 包括包含超低噪音风扇叶片的轴流风扇的商业空气冷却装置
CN102947595B (zh) * 2010-04-05 2016-10-12 穆尔风扇有限责任公司 包括包含超低噪音风扇叶片的轴流风扇的商业空气冷却装置

Also Published As

Publication number Publication date
MX9300801A (es) 1993-09-01
JPH05280493A (ja) 1993-10-26
ES2048695T1 (es) 1994-04-01
JPH10122194A (ja) 1998-05-12
BR9300587A (pt) 1993-08-24
EP0557239A3 (fr) 1993-10-06
JP2746806B2 (ja) 1998-05-06
US5273400A (en) 1993-12-28
TW245757B (fr) 1995-04-21
EP0557239A2 (fr) 1993-08-25
ES2048695T3 (es) 1996-07-01
JP2837665B2 (ja) 1998-12-16
KR970011168B1 (en) 1997-07-08

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